Towel bar



FIG. 1 is a perspective view of a towel bar showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right end view thereof;

FIG. 4 is a left end view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a rear view thereof.

The ornamental design for a towel bar, as shown and described.